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Veseljchak [2.6K]
3 years ago
15

.

Mathematics
1 answer:
makvit [3.9K]3 years ago
7 0
The answer is A)$25.60
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A class is selling magazines as a fund raiser. Of the 500 magazines sold, Allie sold 1/7of them. Gary sold 0.085 of the magazine
jarptica [38.1K]
Allie sold about 71 magazines.
Gary sold about 43.
Rob sold about 45.
Felisha sold about 93.
Felisha sold the most magazines.

Elaboration:
Since Allie sold 1/7 of the 500 magazines, you must find 1/7 of 500. To do this, multiply 500 by the numerator, which is 1. Now you have \frac{500}{7}, which is the same thing as dividing 500 by 7, which is around 71.

Since Gary sold 0.085 of the magazines, you multiply this decimal by that same 500, getting about 43.

Since Rob sold 9/100 of the magazines, you once again multiply 500 by the numerator, coming out with 4,500. Then you replace the 9 with that number, so you have \frac{4,500}{100}, which is also the same thing as Allie's in the fact that you're dividing 4,500 by 100, which is 45. Therefore, Rob sold 43 magazines.

Since Felisha sold 0.185 of the magazines, you follow the same procedure as with Gary - multiply the decimal by 500, getting 93.

Hope this helps! Live long and prosper, my friend. :)
4 0
3 years ago
Which congruence theorems or postulates could be given as reasons why ABC =XYZ HELP !!!!
lara31 [8.8K]
Answers: 
A) SAS
B) ASA
E) LL

============================================================

Explanation:

Let's go through each possible answer choice

A. We can use SAS because we know that AC = XZ (horizontal sides) is one pair of congruent sides, the angle pairing is C = Z, and the other pair of sides is BC = YZ (vertical sides)

B. We can also use ASA. Note how A = X is one pair of angles, AC = XZ is the middle pair of sides, and C = Z is the second pair of angles. The side is between the angles.

C. We can't use SSS as we don't know AB = XY is true or not. There are no tick marks indicating congruence.

D. We can't use LA here because we don't know the altitudes (LA = leg altitude)

E. We can use LL here because we have two right triangles. The two pairs of legs (AC = XZ and BC = YZ) are congruent based on the tickmarks.

F. We can't use HL similar to the reasoning for choice C. We don't know the hypotenuses are congruent or not. If we knew that AB = XY, then we could use HL (hypotenuse leg).


4 0
4 years ago
Read 2 more answers
Sina×tga=1/2, cosa=?​
ArbitrLikvidat [17]

Answer:

<em>cos a = -1.28 and 0.78</em>

Step-by-step explanation:

The question is not properly written. This is the correct question:

If sina×tan(a) = 1/2, find cosa

According to trigonometry identity;

tan a = sina/cosa

sina×tan(a) = sin a * sina/cosa

sin²a/cos a = 1/2

(1-cos²a)/cosa = 1/2

Cross multiply

2(1-cos²a) = cos a

2 - 2 cos²a = cos a

2cos²a + cos a - 2 = 0

Let P = cos a

2P² + P -2 = 0

P = -1 ±√1-4(2(2)/2(2)

P =  -1 ±√1+16/4

P = -1 ±√17/4

P = -1±4.12/4

P = -1-4.12/4 and -1+4.12/4

P = -5.12/4 and 3.12/4

P = -1.28 and 0.78

Since P = cos a

<em>Hence cos a = -1.28 and 0.78</em>

7 0
3 years ago
Which methods could you use to calculate the x-coordinate of the midpoint of a horizontal line segment with endpoints at (0, 0)
SpyIntel [72]
You could add the two x-coordinates together (in this case, 0 and 20) and then divide them by 2 to get an x-coordinate of 10 for their midpoint. 
6 0
3 years ago
Read 2 more answers
What is the surface area of the solid
Stella [2.4K]

Answer:

189

Step-by-step explanation:

each of the triangles has a area of 35 cm, so 35x4=140, then the square is 49 cm so its 140+49=189.

5 0
3 years ago
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